一. 口算× 3= 5÷ = ÷ = × ÷ = ÷ = ×( + )= × = ÷5= 0÷ = - =二. 脱式计算,能简算的就简算3.2×6+(1.5+2.5)÷1.60.12× 4.8÷0.12×4.8907×99+90787.5÷12.5÷8三. 解方程0.36×5- 34 x = 35 25 X-13 X=310 70%X +
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![一. 口算× 3= 5÷ = ÷ = × ÷ = ÷ = ×( + )= × = ÷5= 0÷ = - =二. 脱式计算,能简算的就简算3.2×6+(1.5+2.5)÷1.60.12× 4.8÷0.12×4.8907×99+90787.5÷12.5÷8三. 解方程0.36×5- 34 x = 35 25 X-13 X=310 70%X +](/uploads/image/z/199434-66-4.jpg?t=%E4%B8%80%EF%BC%8E+%E5%8F%A3%E7%AE%97%C3%97+3%3D+5%C3%B7+%3D+%C3%B7+%3D+%C3%97+%C3%B7+%3D+%C3%B7+%EF%BC%9D+%C3%97%EF%BC%88+%EF%BC%8B+%EF%BC%89%3D+%C3%97+%3D+%C3%B75%3D+0%C3%B7+%3D+%EF%BC%8D+%3D%E4%BA%8C%EF%BC%8E+%E8%84%B1%E5%BC%8F%E8%AE%A1%E7%AE%97%2C%E8%83%BD%E7%AE%80%E7%AE%97%E7%9A%84%E5%B0%B1%E7%AE%80%E7%AE%973.2%C3%976%2B%EF%BC%881.5%2B2.5%EF%BC%89%C3%B71.60.12%C3%97+4.8%C3%B70.12%C3%974.8907%C3%9799%EF%BC%8B90787.5%C3%B712.5%C3%B78%E4%B8%89%EF%BC%8E+%E8%A7%A3%E6%96%B9%E7%A8%8B0.36%C3%975-+34+x+%3D+35+25+X-13+X%3D310+70%25X+%2B)
一. 口算× 3= 5÷ = ÷ = × ÷ = ÷ = ×( + )= × = ÷5= 0÷ = - =二. 脱式计算,能简算的就简算3.2×6+(1.5+2.5)÷1.60.12× 4.8÷0.12×4.8907×99+90787.5÷12.5÷8三. 解方程0.36×5- 34 x = 35 25 X-13 X=310 70%X +
一. 口算
× 3= 5÷ = ÷ = × ÷ = ÷ =
×( + )= × = ÷5= 0÷ = - =
二. 脱式计算,能简算的就简算
3.2×6+(1.5+2.5)÷1.6
0.12× 4.8÷0.12×4.8
907×99+907
87.5÷12.5÷8
三. 解方程
0.36×5- 34 x = 35
25 X-13 X=310
70%X + 20%X = 3.6
5X-3× =
0.36×5- 34 x = 35
12 x- 25%x = 10
x―0.8x―6=16
45%x=45
一. 口算× 3= 5÷ = ÷ = × ÷ = ÷ = ×( + )= × = ÷5= 0÷ = - =二. 脱式计算,能简算的就简算3.2×6+(1.5+2.5)÷1.60.12× 4.8÷0.12×4.8907×99+90787.5÷12.5÷8三. 解方程0.36×5- 34 x = 35 25 X-13 X=310 70%X +
1 看不懂
2 19.2+2.5=21.7 0.12×(4.8+4.8)=1.152
907×(100-1)=907×100-907×1=89793
7÷8=8分之7
3 ⑴1.8-34X =35
34X =33.2
X ≈0.98
⑵12X=310 X ≈25.8
⑶ 90%X=3.6
X =4
⑷2X
⑸11.75X=10
X≈0.85
⑺0.2X = 10
X =50
⑻0.45X=45
X=100