100加200等于几
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解:100十200等于( 300 )
∵已知需求出100十200等于多少
A + B = C
A + A + A = 3 × A = 3A
A × (B + C)= A × B + A × C
∴方法一:
100 + 200
= 100 + (100 + 100)
= 100 + 100 + 100
= 100 × 3
= 300
方法二:
100 + 200
= 100 + 2 × 100
= 100 × (1 + 2)
= 100 × 3
= 300
答:100十200等于300
∵已知需求出100十200等于多少
A + B = C
A + A + A = 3 × A = 3A
A × (B + C)= A × B + A × C
∴方法一:
100 + 200
= 100 + (100 + 100)
= 100 + 100 + 100
= 100 × 3
= 300
方法二:
100 + 200
= 100 + 2 × 100
= 100 × (1 + 2)
= 100 × 3
= 300
答:100十200等于300
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