口算
45+32= 500+300= 450+500= 50+800= 3000﹣1500=
35÷7= 360﹣30= 730﹣700= 9×4= 3600﹣600=
计算下面各题,能简算的要简算.
0.89×100.1146.5﹣(23+46.5)5.83×2+5.83×845.9÷8÷0.125.
直接写得数.
2﹣0.64﹣0.36﹦0.25×4÷0.25×4=6.3+7=
1.25×3.3×0﹦2.19+9.1=37.2×99+37.2﹦
脱式计算,能简算的要简算.
1.69÷1.3+2.5×0.4 1.25×32×2.5 96.5×105﹣5×96.5 18.75﹣0.43﹣4.57.
递等式计算.(能简算的要简算)
0.125×32×2.5;0.8×6.3﹣0.8×3.80.64÷0.4÷0.8.
(25+2.5)×0.41.25×7.23.75×2.9+2.9×6.25
3.25+110.4÷(3.2×2.3)2.5×54.8﹣2.5×14.86.3÷(13﹣3.15÷0.3)