A. | B. | C. | D. |
A.OFF、M+ | B.CE、ON | C.ON、OFF | D.M+、CE |
A.左 | B.右 | C.中间 |
60×9=_____ | 600+38=_____ | 36÷4=______ | 90+420=_____ | 325+475=___ |
98-15=____ | 72÷8=_______ | 45÷9=______ | 16×7=______ | 0+15=______ |
150×0=____ | 92-9=______ | 320-207=___ | 129+350=___ | 200-170=___ |
400×5=____ | 900-750=___ | 7×700=____ | 3×222=_____ | 5×9+6=____ |
22×6 ≈____ | 302×9≈_____ | 298×3≈____ | 29×8≈_____ | 508-397≈____ |
____ | _____ | ____ | _____ | _____ |
A. | B. | C. | D. |
A. | B. | C. |