37 x 18 - 9 x 14 + 100

=37*2*9-9*14+100

=74*9-9*14+100

=9*(74-14)+100

=9*60+100

=540+100

=640

15 x 2 + 15 x 3 + 15 x 5

=15*(2+3+5)

=15*10

=150

52 + 37 + 48 + 63

=(52+48)+(37+63)

=100+100

=200

37 x 18 - 9 x 14 + 100 = 37 x 2 x 9 - 9 x 14 + 100

= 74 x 9 - 9 x 14 + 100

= (74 - 14) x 9 +100

= 60 x 9 + 100

= 540 + 100

= 550

15 x 2 + 15 x 3 + 15 x 5 = 15 x ( 2 + 3 +5 )

= 15 x 10

= 150

52 + 37 + 48 + 63 = (52 + 48) + (37 + 63)

= 100 + 100

= 200

Duyệt!!!

a) 25 + 5 x 5 = 25 + 25

                  = 50

b) 160 – 48 : 4 = 160 - 12

                  = 148

c) 732 + 46 : 2 = 732 + 23

                  = 755

d) 974 – 52 x 3 = 974 – 156

                  = 818

kt bn hok

xx +x+52=100

xx + x = 52 - 100

xx +x = 48

x *11 + x = 48

x *(11+1)=48

x * 12 = 48 

        x = 48 : 12 

           x= 4

3 x = 100 - 52 = 48

x = 48 : 3 = 16

Đáp số: x = 16

x+52=100-34

=>x+52=66

=>x     =66-52

=>x     =14

\(x+52=100-34\)

\(\Rightarrow x+52=66\)

\(\Rightarrow x=66-52=14\)

Bài 2 tính chậm:

P/S: Lấy máy tính ra mà tính

a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 -  20 )

                                            = 55 x 0 = 0

253 + 10 x 4 = 253 + 40 = 293

41 x 5 - 100 = 205 – 100 = 105

93 – 48 : 8 = 93 – 6 = 87

253 + 10 x 4 = 253 + 40 = 293

41 x 5 - 100 = 205 – 100 = 105

93 – 48 : 8 = 93 – 6 = 87 

              ---------------------HỌC TỐT-------------------

x + 48 - 12 = 969 - 100 

x + 48 - 12 = 869 

x + 48 = 981 

x        = 981 - 48 

x        = 933

X + 48 -12 = 969 -100

X +48 -12 =869

X + 48 =869 + 12

X + 48 = 881

X = 881 - 48

X = 833

a) 253+10x4=253+40=293

b)  41x5-100=205-100=105

c) 93-48:8=93-6=87

d) 500+6x7=500+42=542

e) 30x8+50=240+50=290

g) 69+20x4=69+80=149

253 + 10 x 4

41 x 5 - 100

93 - 48 : 8

500 + 6 x 7

30 x 8 + 50

69 + 20 x 4

wsujvgyhbcy;iyv  b ucbh hii3yrhrirnh/r/2wju

vỉ3

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