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脱式计算,能简算的要简算.2.65×1.7+1.35×1.723.4...

根据题意可得:(1)2.65×1.7+1.35×1.7,=(2.65+1.35)×1.7,=4×1.7,=6.8;(2)23.4÷7.8-2.1,=3-2.1,=0.9;(3)0.25×0.8×4×0.125,=(0.25×4)×(0.8×0.125),=1×0.1,=0.1.

(1)12.25-3.1+0.85-6.17,=(12.25+0.85)-3.1-6.17,=13.1-3.1-6.17,=3.83;(2)2.65×1.7+1.35×1.7,=(2.65+1.35)×1.7,=4×1.7,=6.8;(3)3.6÷(1.2+0.5)×5,=3.6÷1.7×5,=3617×5,=101017; (4)0.125×0.38×80,=(0.125×80)×0.38...

4×1.7=6.8

(1)12.25-3.1+0.85-6.17,=12.25+0.85-3.1-6.17,=13.1-3.1-6.17,=10-6.17,=3.83;(2)2.65×1.7+1.35×1.7,=(2.65+1.35)×1.7,=4×1.7,=6.8;(3)6.9×10.1,=6.9×10+6.9×0.1,=69+0.69,=69.69;(4)0.125×25×80×0.4,=(0.125×80)×...

(1)8×1.09×1.25,=8×1.25×1.09,=10×1.09,=10.9;(2)1.5×106,=1.5×(100+6),=1.5×100+1.5×6,=150+9,=159;(3)1.65×4.3+8.35×4.3,=(1.65+8.35)×4.3,=10×4.3,=43;(4)3.8+7.19+5.2+3.91,=(3.8+5.2)+(7.19+3.91),=9+11.1...

(1)19.6÷20÷0.5,=19.6÷(20×0.5),=19.6÷10,=1.96;(2)2.65×1.7+1.7×1.35,=(2.65+1.35)×1.7,=4×1.7,=6.8;(3)0.145×500×2,=0.145×(500×2),=0.145×1000,=145;(4)102×0.45,=(100+2)×0.45,=100×0.45+2×0.45,=45+0.9,=...

2.65x1.7+13.5x0.17=2.65x1.7+1.35x1.7=(2.65+1.35)x1.7=4x1.7=6.8

=2.65×1.7+1.35×1.7 =(2.65+1.35)×1.7 =4×1.7 =6.8

17/4-(0.65+0.35)+2/9=17/4-1+2/9 =3又17/36

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