A.(a+0.6)÷2.8 | B.2.8a+0.6 | C.2.8a-0.6 |
A.a+15×c | B.(a+c)×15 | C.a×15×c |
A.0.25÷x=2.5 解:x=2.5÷0.25 x=10 |
B.0.25÷x=2.5 解:=0.25÷2.5 =0.1 |
C.0.25÷x=2.5 解:x=0.25÷2.5 x=0.1 |
D.0.25÷x=2.5 解:x=2.5×0.25 x=0.625 |
A.x+5=10 | B.5-x=2 | C.3+y=10 | D.37-x=30 |
x | x | x | x | ||
y | y | y | |||
x | 4.5 |