同学们运图书,每次运18包,每包50本,运了5次,一共运了多少本书?
计算,能简算的要简算 10÷0.2÷2.564×4.5+3.6×451.25×3.2×0.8 14.5×10214.64+3.7×2.88.4÷0.21÷0.5.
7.05×23.7+7.05×76.3.
用简便方法计算: 1.29+3.7+0.71+6.3528×78+472×78125×89×857×101.
①12.5×3.7×0.8 ②4.6×2.3+7.7×4.6 ③3.6+(5.7+3.8)÷0.5 ④3.6÷0.4﹣1.5×3 ⑤0.1÷0.2÷0.4 ⑥80.3﹣5.6×1.7.
脱式计算,能用简算的要简算. 1.3×0.75×4 1.08÷1.8×1.2 50.4×1.9﹣1.8 0.82×0.25+1.18×0.25.