4.8÷42 7.2÷32 5.2÷45.2×4
49.5÷115 15.12÷82 13.5÷313.5÷5
15×30= 3.68-2.52= 5.7÷100= 3.4+5.8+6.6=
42.83÷7≈
3.77×1.8≈
0.02×9.6≈
85.44÷13≈
5.61×2.9≈
4.67×0.9≈
101.5÷9≈
9.99×0.02≈
1.66×6.1≈
列式:
①0.53×2.5+
②25×0.032×12.5
③ [()×]
④6.83+17.9﹣0.83+32.1