Question

Help me

Answer 1

1.a.=121(78+21+1)=121.100=12100

b.=24.76+24.2.12-20.100=24.76+24.24-20.100=(24.76+24.24)-20.100

=24(76+24)-20.100=24.100-20.100=100(24-20)=100.4=400

c.=165(99+1)-163(101-1)=165.100-163.100=100(165-163)=100.3=300

d.=24.62+2.24.19=24.62+24.38=24(62+38)=24.100=2400

Answer 2

5a: x-34=0:15=0\(\Rightarrow\)x=0+34=34

b.x-16=54:18=3 suy ra x=3+16=19

c.x-12=12.5=60 suy ra x=60+12=72

d.20-x=15:5=3 suy ra x=20-3=17

Answer 3

4a: =(135+65)+(360+40)=200+400=600

b.=(463+127)+(318+22)=590+340=930

Answer 4

mk làm hết cho bn phải tick cho mk nhé

Answer 5

3a : 17(131+69)=17.200=3400

b.(13.75+13.25)-140=13(75+25)-140=13.100-140=1300-140=1160

c.204:12-84:12=(204-84):12=120:12=10

d,164(53+47)=164.100=16400

Answer 6

2a: =45607+21175-10750=56032

b.=125+56807-17085=39847

c.1104:48+5964=23+5964=5987

d,17280:960+1296=18+1296=1944

Answer 7

tick cho mk nhé bn

Answer 8

tick hết luôn nhé