A.340×3+260 | B.340×(3+260) |
C.340+260×3 | D.(260+80)×3 |
A.21 | B.20 | C.19 | D.18 |
A.50+80-(15÷5) | B.45+(75-9)÷2 | C.94-45÷(3×3) |
A.2 | B.12 | C.22 | D.32 |
A.(199+17)÷3-2 |
B.(199+17)×3+2 |
C.(199-17)÷3-2 |
D.199-17÷3+2 |
A.(199+17)÷3-2 |
B.(1994+17)×3+2 |
C.(199-17)÷3-2 |
D.199-17÷3+2 |
A.75+25×16 | B.16×(75+25) | C.300÷75+25×4 | D.(75+25×4)÷5 |
A.14 | B.2 | C.任何数 |
A.20 | B.21 | C.22 |
A.28 | B.36 | C.30 |