Multiplying, dividing and mixed operations · Ages 9–10
Multiplying near 100 worksheet
Part of: Multiplying and dividing by two digits; divisibility
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Multiplying near 100 worksheet
Multiplying, dividing and mixed operations · Ages 9–10
Numsprite
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Name:Date:Score:／48
Write each answer in the space. For word problems, show your working and write a sentence answer.
Part A: Working out and filling in (2 marks each)
1.89 × 89
Answer:
2.89 × 98
Answer:
3.94 × 90
Answer:
4.89 × 90
Answer:
5.89 × 97
Answer:
6.93 × 95
Answer:
7.99 × 97
Answer:
8.93 × 94
Answer:
9.99 × 90
Answer:
10.94 × 97
Answer:
11.98 × 93
Answer:
12.91 × 98
Answer:
Part B: Word problems (4 marks each)
13.A concert ticket costs $94. A choir buys tickets for 95 members. How many dollars must it pay?
Working:
Answer:
14.A flower farm has 96 rows of 95 plants each. How many plants are there altogether?
Working:
Answer:
15.A concert ticket costs $93. A choir buys tickets for 89 members. How many dollars must it pay?
Working:
Answer:
16.A flower farm has 93 rows of 97 plants each. How many plants are there altogether?
Working:
Answer:
17.Each bag holds 95 marbles. A toy shop has 89 bags. How many marbles is that?
Working:
Answer:
18.Each bag holds 97 marbles. A toy shop has 98 bags. How many marbles is that?
Working:
Answer:
Show the answers and working
Multiplying near 100 worksheet: Answers and working
Part A: Working out and filling in
1. 89 × 89 = 7921
89 × 89: 89 is 11 short of 100, 89 is 11 short. Front 89 − 11 = 78, back 11 × 11 = 121, the back runs past two digits, so carry: 78 × 100 = 7800, 7800 + 121 = 7921
2. 89 × 98 = 8722
89 × 98: 89 is 11 short of 100, 98 is 2 short. Front 89 − 2 = 87, back 11 × 2 = 22, front then back → 8722
3. 94 × 90 = 8460
94 × 90: 94 is 6 short of 100, 90 is 10 short. Front 94 − 10 = 84, back 6 × 10 = 60, front then back → 8460
4. 89 × 90 = 8010
89 × 90: 89 is 11 short of 100, 90 is 10 short. Front 89 − 10 = 79, back 11 × 10 = 110, the back runs past two digits, so carry: 79 × 100 = 7900, 7900 + 110 = 8010
5. 89 × 97 = 8633
89 × 97: 89 is 11 short of 100, 97 is 3 short. Front 89 − 3 = 86, back 11 × 3 = 33, front then back → 8633
6. 93 × 95 = 8835
93 × 95: 93 is 7 short of 100, 95 is 5 short. Front 93 − 5 = 88, back 7 × 5 = 35, front then back → 8835
7. 99 × 97 = 9603
99 × 97: 99 is 1 short of 100, 97 is 3 short. Front 99 − 3 = 96, back 1 × 3 = 3, the back is always two digits: 3 is written 03, front then back → 9603
8. 93 × 94 = 8742
93 × 94: 93 is 7 short of 100, 94 is 6 short. Front 93 − 6 = 87, back 7 × 6 = 42, front then back → 8742
9. 99 × 90 = 8910
99 × 90: 99 is 1 short of 100, 90 is 10 short. Front 99 − 10 = 89, back 1 × 10 = 10, front then back → 8910
10. 94 × 97 = 9118
94 × 97: 94 is 6 short of 100, 97 is 3 short. Front 94 − 3 = 91, back 6 × 3 = 18, front then back → 9118
11. 98 × 93 = 9114
98 × 93: 98 is 2 short of 100, 93 is 7 short. Front 98 − 7 = 91, back 2 × 7 = 14, front then back → 9114
12. 91 × 98 = 8918
91 × 98: 91 is 9 short of 100, 98 is 2 short. Front 91 − 2 = 89, back 9 × 2 = 18, front then back → 8918
Part B: Word problems
Marking: 2 for the working, 1 for the answer, 1 for the sentence.
13. A concert ticket costs $94. A choir buys tickets for 95 members. How many dollars must it pay? (Answer: 8930 dollars)
94 × 95 = 8930
14. A flower farm has 96 rows of 95 plants each. How many plants are there altogether? (Answer: 9120 plants)
96 × 95 = 9120
15. A concert ticket costs $93. A choir buys tickets for 89 members. How many dollars must it pay? (Answer: 8277 dollars)
93 × 89 = 8277
16. A flower farm has 93 rows of 97 plants each. How many plants are there altogether? (Answer: 9021 plants)
93 × 97 = 9021
17. Each bag holds 95 marbles. A toy shop has 89 bags. How many marbles is that? (Answer: 8455 marbles)
95 × 89 = 8455
18. Each bag holds 97 marbles. A toy shop has 98 bags. How many marbles is that? (Answer: 9506 marbles)
97 × 98 = 9506
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