486+14= | 465×0= | 56÷7= | 992×3≈ |
+ = | 407×3= | 270﹣90= | 880﹣407= |
1﹣ = | 306×8≈ | ﹣ = | 289+764= |
填一填
1-
4500克4千克 398×52000
120÷6120÷2÷3
210×3= 983+117≈ 300×9= 231+469= 298×9≈
840﹣240= ﹣ = + = 1﹣ = + =
36+28= 80﹣27= 400×5= 12×4= 210+0=
60×9﹣40= + = 1﹣ = 202×5≈ 640﹣90=
230 + 350= 206×3 = 160+340 = 570-290 =
= = + = 999 ×1 =
202× 9 ≈ 598-153 ≈ 390 × 5 ≈ 117 × 4 ≈