①0.69×99
②0.125×3.2×2.5
③0.99×9+0.99
④5.6×1.25
⑤1.63×1.73-1.63×0.73
⑥101×0.43
8.13÷3.7≈2.19(结果保留两位小数)
( ) 改正:
①3.14×7.2+3.14×2.8
②9.9×99+9.9
③58×9.9
④12.5×32×2.5
⑤2.9×102
①-+-
②×+÷
③(6﹣1.3×4)÷0.1
④0.4×0.25×8×125
⑤3.4÷[(1.25+0.45)×23]
①2021÷1.25÷
②5.74×12.5%+1.26÷8+
③(-0.6)÷(-)
④0.8÷[(+)×]