\(65+5=70\)

k nha

65 + 5 = 70

tchs mình nha mình tchs lại

1100

1400

1020+15+65

=1035+65

=1100

1200+100+100

=1300+100

=1400

65 + 35 + 100

= ( 65 + 35 ) + 100

= 100 + 100

= 100 x 2 

= 200

65 + 35 + 100

= 100 + 100

= 200

100 + 54 + 65 + 66 + 55 + 10 + 6=356

k cho mk nha

mk nhanh nhất

100+54+65+66+55+10+6

=154+65+66+56+10+6

=219+66+56+10+6

=275+56+10+6

=331+10+6

=341+6

=347

k mk nha mk đang bị âm điểm1

a) số số hạng là :

(100-1):1+1=100 số

TBC số đầu và cuối là:

(100+1):2=50,5

=>tổng đó là :

100.50,5=5050

b)

23+65+77+76+35+24

=(23+77)+(65+35)+(76+24)

=100+100+100

=300

c)45+78+65+22

=(45+65)+(78+22)

=110+100

=210

Dễ:65+(6x4)=65+24

                     = 89

x+65=100

     x=100-65

     x=35

ai k tui

tui k lại

x+65=100

x     =100-65

x     =35

\(890-90+100+100=1000\)

k mk 3 cai mk k lai cho

890-90+100+100=800+100+100

                        =900+100

                        =1000

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bị sao d

0

10

nha bn k mk nha bn

thanks nhju

\(99+1-100=0\)

\(66+44-100=10\)

k mk mk k lại nhé