a) 90 – ( 30 – 20) = 90 – 10

                   = 80

90 – 30 – 20 = 60 - 20

                  = 40

b) 100 – (60 + 10) = 100 – 70

                   = 30

100 - 60 + 10 = 40 + 10

                   = 50

c) 135 – (30 + 5) = 135 – 35

                   = 100

135 – 30 – 5 = 105 – 5

                   = 100

d) 70 + (40 – 10) = 70 + 30

                   = 100

70 + 40 – 10 = 110 -10

                   = 100

nguuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

100 + 100 : 10 x 20 + 70 = 470

100 x 100 + 200 = 10 200

1111 + 1111 + 1111 + 1111+ 1111 + 1111 + 1111 + 1111 + 1111 + 1111 = 11 110

1111 x 10 = 11 110

Câu 1:100 + 100 :10 x 20 + 70=100+10x20+70=100+200+70=370

Câu 2:100 x 100+200=10 000+200=10 200

Câu 3:1111+1111+1111+1111+1111+1111+1111+1111+1111+1111=1111x10=11 110

Câu 4:1111x10=11 110

Kết quả bằng 0

h nhá

10 -20 = 80 - 20 = 60 + 50 = 110 + 60 = 170 - 70 = 100 - 100 = 0 + 90 = 90 - 80 = 10 - 10 = 0

đáp số : 0

C

C

a)=120+4+120      b)=100-4-4         c)=60+2/5         K NHA MOI NGUOI THANK YOU

=244                  =92                           =302/5

Trả lời

a)120+400:100+120

=120+4+120

=244

b)100-20:5-4

=100-4-4

=92

c)70-10+40:100

=70-10+0,4

=59,6

10 + 20 + 30 + 40 + 50 + 60 + 70 + 80 + 90 + 100 = 550

Chúc bạn học tốt nhé !

10+20+30+40+50+60+70+80+90+100=(10+90)+(20+80)+(30+70)+(40+60)+50+100=100+100+100+100+50+100=(100+100+100+100+100)+50=500+50=550

= 550 nha bn

=10+90+20+80+30+70+40+60+50+100

=100+100+100+100+50+100

=550

= 10 x ( 1 + 2 + 3 + 5 + 6 + 7 + 8 + 9 + 10)

= 10 x 45

= 450 

10+20+30+40+50+60+70+80+90+100

=(100+10)+(90+20)+(80+30)+(70+40)+(60+50)

=110+110+110+110+110

=110x5=550

Đúng 100% đấy !

10+20+30+40+50+60+70+80+90+100=(10+100)+(20+90)+(30+80)+(40+70)+(50+60)

                                                       =110+110+110+110+110

                                                       =110x5

                                                       =550

550

k cho mình nhé