7.4×0.2+2.4×1.4 用简便运算怎么算?急
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7.4×0.2+2.4×1.4用简便运算怎么算?急7.4×0.2+2.4×1.4用简便运算怎么算?急7.4×0.2+2.4×1.4用简便运算怎么算?急7.2×0.2+2.4×1.4=2.4×0.6+2
7.4×0.2+2.4×1.4 用简便运算怎么算?急
7.4×0.2+2.4×1.4 用简便运算怎么算?急
7.4×0.2+2.4×1.4 用简便运算怎么算?急
7.2×0.2+2.4×1.4
=2.4×0.6+2.4×1.4
=2.4×(0.6+1.4)
=2.4×2
=4.8
7.4×0.2+2.4×1.4 用简便运算怎么算?急
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