
0.87×3.36+4.64×0.87 4.2×7.8+2.2×4.2 脱式简便计算
12个回答
2014-09-20
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0.87×3.36+4.64×0.87
=0.87×(3.36+4.64)
=0.87×8
=6.96
4.2×7.8+2.2×4.2
=4.2×(7.8+4.2)
=4.2×12
=50.8
=0.87×(3.36+4.64)
=0.87×8
=6.96
4.2×7.8+2.2×4.2
=4.2×(7.8+4.2)
=4.2×12
=50.8
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