32+(-5), -8+(-5), 56+(-34), 6+(-32), 5+(-2), 56+ (7), -12 + 8, 20 + (-20), 10+(- 30), -40+20, 40+(-30), -30+(-20), 30-30, 12+20

Integer addition

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Addition 1 -10
Addition 1 -10
由
刺破气球
Calcolo a mente: + 9 - 9
Calcolo a mente: + 9 - 9
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Addition number
Addition number
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Find the sum.
Find the sum.
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SUMAR O RESTAR +1 +10 -1 -10
SUMAR O RESTAR +1 +10 -1 -10
由
问答游戏
Addition plus 4
Addition plus 4
由
打地鼠
Mental addition strategy: compensating. Round up numbers like 19 to an 'easy' 20, add it on, then subtract 1 from total.
Mental addition strategy: compensating. Round up numbers like 19 to an 'easy' 20, add it on, then subtract 1 from total.
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Addition +0, +1, +2, +3
Addition +0, +1, +2, +3
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