Adding and subtracting near multiples of ten (two days).
Children revise adding 19 and 21 by adding 20 and adjusting (J10, Jump 10 and ‘overjumping’). They add 30, 40 and 50 to two-digit numbers (answer less than 100), and then adjust to add 29, 31, 39, 41, 49 and 51. They use the same strategy to subtract 29, 31, 39, 41, 49 and 51. They record their jumps and hops on landmarked lines empty number lines.
Find additional lesson plans and resources at www.hamilton-trust.org.uk.
Children revise adding 19 and 21 by adding 20 and adjusting (J10, Jump 10 and ‘overjumping’). They add 30, 40 and 50 to two-digit numbers (answer less than 100), and then adjust to add 29, 31, 39, 41, 49 and 51. They use the same strategy to subtract 29, 31, 39, 41, 49 and 51. They record their jumps and hops on landmarked lines empty number lines.
Find additional lesson plans and resources at www.hamilton-trust.org.uk.
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This is a brilliant compliment to my existing planning, thank-you.
Superb detailed planning on adding and subtracting near multiples of 10 (19 and 21). Use in Year 3.
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