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| ①26.9+72.8÷5.6 =26.9+13 =39.9 ②1.25×3.2×0.25 =(1.25×8)×(0.4×0.25) =10×0.1 =1 ③3.4×11.3+3.4×8.7 =3.4×(11.3+8.7) =3.4×20 =68 ④3.6÷1.5÷4 =3.6÷(1.5×4) =3.6÷6 =0.6 ⑤62×101-62 =62×(101-1) =62×100 =6200 ⑥0.12×50+53.4 =6+53.4 =59.4 |
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