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56 m 102 cm = 561.02m
13 m 8 cm = 130.8dm
2 km 18 dam =201.8hm.
24m 11dm = 241.1 m
216m 1024 mm = 216.1024m
61dm 2019mm = ........cm.
* sai xin lỗi ạ
56 m 102 cm = ..57,02......m
13 m 8 cm = ...130,8.......dm
2 km 18 dam =...21,8.....hm.
24m 11dm = ..25,1...... m
216m 1024 mm = ..217,024.....m
61dm 2019mm = ..63,019......cm.
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=15.(1/90.94+1/94.98+....+1/146.150) =15.1/4(1/90-1/94+1/94-1/98+1/9 --......+1/150 =15/4.(1/90 - 1/150) =15/4.1/1225 =1/60 NHỚ nhấn đúng nha
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23,45<34,99;102,567>102,49
99,78>99,12;78,56=78,560
Bài 2,
3,45;4,3;5,6;5,9;102,609
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a) ( 735 - 135 ) + ( 243 - 143 ) = 600 + 100
= 700
b) 31 x ( 118 - 48 ) = 31 x 70
= 2170
c) ( 25 x 32 ) x7 = 800 x 7
= 2400
d ) 47 x ( 63 + 47 ) - 38
= 47 x 100 - 38
= 4700 - 38
=4662
h ) ( 53 + 47 ) x ( 39 + 21 ) = 100 x 60
= 6000
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2-4+6-8+...-100+102
= (2 - 4) + (6 - 8) + ........... +(98 - 100) + 102
= -2 + -2 + -2 + ..... + -2 + 102
= -2.50 + 102
= -100 + 102
= 2
102 - 100 + 98 - 96 + ... + 6 - 4 + 2( có 51 số )
= ( 102 - 100 ) + ( 98 - 96 ) + .... + ( 6 - 4 ) + 2 ( có 25 nhóm )
= 2 + 2+ 2+ ... + 2 ( có 26 số 2 )
= 2 x 26
= 52
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SSH:
-(102-2):2+1=(-51)
Tổng :
-(102+2).(-51):2=(-2652)
(-)là âm nha bạn
l-i-k-e cho mình nha