Adding and taking away · Usually met around P2
Three-digit adding and taking away
From “Three-digit adding and taking away, no carrying” to “Giving change”, step by step, each skill with its methods, worked examples and answers.
Skills in this topic, easy to hard
- Three-digit adding and taking away, no carryingHundreds, tens and ones, each with its own
- Three-digit + and −Left to right, one place at a time
- Adding three numbers in a chainAdd left to right; a column of 20 or more carries 2
- Adding in a handy orderAdd the two that make a hundred first
- Taking away twiceLeft to right, or take away the two numbers' sum
- Adding and taking away togetherWith + and −, go left to right
- Making 100Fill up in steps: to the next 10, then 100
- Giving changeCount up from the price, like a shopkeeper
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