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简介:
1.7×4.7+4.7+4.3×4.7
=4.7×(1.7+1+4.3)
=4.7×(2.7+4.3)
=4.7×7
=32.9
0.027+9.9×0.27
=0.1×0.27+9.9×0.27
=(0.1+9.9)×0.27
=10×0.27
=2.7
3.6×2.5+7.5×3.6
=3.6×(2.5+7.5)
=3.6×10
=36
0.25×0.125×4×8
=(0.25×4)×(0.125×8)
=1×1
=1
4.2×6.8+3.2×4.2
=4.2×(6.8+3.2)
=4.2×10
=42
17.4÷0.25÷4
=17.4÷(0.25×4)
=17.4÷1
=17.4