Question

A:10+300=400
A=?

(35+B)×10-25=325
B=?

(C-24):5+90=100
C?

(200-D):10+90=100
D?

500:E+(300:10-20)=60
E?

(30×10)-(4×F+50×2)=100
F?

Answer 1

A : 10+300 = 400
A : 10 = 400-300
A : 10 = 100
A = 100×10
A = 1 000

(35+B)×10-25 = 325
(35+B)×10 = 325+25
(35+B)×10 = 350
35+B = 350:10
35+B = 35
B = 35-35
B = 0

(C-24):5+90=100
(C-24):5 = 100-90
(C-24):5 = 10
C-24 = 10×5
C-24 = 50
C = 50+24
C = 74

(200-D):10+90=100
(200-D):10 =100-90
(200-D) : 10 = 10
200-D = 10×10
200-D = 100
D = 200-100
D = 100



500:E+(300:10-20)=60
500: E + 10 = 60
500 : E = 60-10
500:E = 50
E = 500:50
E = 10


(30×10)-(4×F+50×2)=100
300 - (4×F+100) = 100
4×F+100 = 300 - 100
4×F +100 = 200
4×F = 200-100
4×F = 100
F = 100:4
F = 25