计算.
直接写出得数1800﹣799= 560÷8×7= 1÷0.04= 8×125%=0.3×0.3÷0.3×0.3= ÷60%= := 4.6÷0.2=
在图中涂色(或画阴影)表示出.
3.2÷0.01==5.6+3.99=1.7÷2.5=2×9.9====
直接写出得数 410﹣210= = 72.8÷0.8= =1.375﹣= = = 5.2+0.54+0.46=
口算.800﹣250= 30×40= 8100÷900= 10﹣0.98= 105÷7= 560+770=0.25×0.4= 6.3÷0.07= 0.64÷8= 8.85×10= 4.73+0.7= == = = 3.6×= 8×1.36×1.25= 7.2×2.8+2.8×0.8=