78×32+67×32+78怎么做?

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78×32+67×32+78怎么做?78×32+67×32+78怎么做?78×32+67×32+78怎么做?78×32+67×32+78=(78+67)×32+78=145×32+78=145×2×1

78×32+67×32+78怎么做?
78×32+67×32+78怎么做?

78×32+67×32+78怎么做?
78 × 32 + 67 × 32 + 78
= (78 + 67)× 32 + 78
= 145 × 32 + 78
= 145 × 2 × 16 + 78
= 290 × 16 + 78
= 4640 + 78
= 4640 + 80 - 2
= 4720 - 2
= 4718
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