A.800×5-50+800 | B.(800+50)÷5+800 |
C.(800-50)÷5+800 | D.800÷5-50+800 |
A.300÷(3+2×6) | B.300÷3+2×6 |
C.300÷[(3+2)×6] | D.(300÷3+2)×6 |
A.68-40÷4=28÷4=7 | B.68-40÷4=68-10=58 | C.68-40÷4=10-68=58 | D.68-40÷4=68-10=85 |
A.相等 | B.变大了 | C.变小了 | D.无法确定 |
A.6÷18+450 | B.18+450÷6 | C.18÷6+450 | D.(18+450)÷6 |
A.4个 | B.3个 | C.2个 | D.5个 |
A.1 | B.0 | C.14 | D.任意数 |
A.1786-200-3 | B.1786-200+3 | C.1786-(200+3) |