③12.8平方米=___平方分米 ④1.5小时=___分
①0.15×1.7◯0.15 ②10.1×0.1◯10.1+0.1
③3.8×0.98◯3.8 ④4.36×10◯43.6 ÷10
淘气:2.5×1.2 =2.5×4×0.3 | 笑笑:2.5×1.2 =2×1÷0.5×0.2 |
奇思:2.5×1.2 =2+0.5+0.4+0.1 | 妙想:2.5×1.2 =2.5×1+2.5×0.2 |
1.5×4= | 4.5+0.45= | 10-2.78= | 11.9+8.01= |
7.87-7= | 1.25×0.8= | 6.4+4.6= | 0.48×20= |
5.94+4.6= 30-12.26=
4.08×3.5= 7.8×1.6=
41.7-6.22-4.78 3.6+1.4×5
2.5×3.7×0.4 6.5×12.9-6.5×2.9