5×★= ★×=720
①0.3×4= ②3.3÷3= ③2.4×5= ④a+a= ⑤2.1÷0.07=
⑥8.2×0.01= ⑦4÷5= ⑧6.2+2.8= ⑨0.45÷9= ⑩3.06÷3=
25×4= 8.2+3.6= 4.5×1000= 3.06÷100=
1﹣0.64= 7.4﹣2.3= 81÷3×3= 243×125×0=
①2.8+ +7.2+
②9 ×4.25+ ÷6
③2.5×3.2×1.25
④75.3×99+75.3
⑤23.46﹣6.57﹣3.43
⑥ ×8.3﹣0.3×62.5%
23×9.6= 23×0.96 = 23×0.096=
3.5-1.7= 4.3+2.7= 75÷100=
0.8-0.65= 6.4+3.8= 5.5-3.8=