A.5 | B.6 | C.7 |
A.360÷2×3 | B.(360÷2)×3 | C.360÷(2×3) |
A.3 | B.4 | C.6 | D.7 |
A.小华计算时,运用简便方法这样做: |
B.一个数减去两个数的和等于这个数连续减去这两个数 |
C. |
D. |
A.6个 | B.12个 | C.16个 | D.18个 |
A.207 | B.288 | C.297 |
A.45+76=46+75 | B.128+72+63=(128+72)+63 |
C.128-75-45=128-(75+45) | D.a+b+c=b+a+c |
A.214 | B.304 | C.349 | D.1159 |
A.(8603-27)-133 | B.8603-133-27 | C.8603-(27+133) |