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53+115 : fifty-three plus one hundred fifteen
132+763 :one hundred thirty two plus seven hundred sixty three
880+2318 :eight hundred eight plus two thousand three hundred ang eighteen
365+2302 :three hundred sixty five plus two thousand three hundred two
448+525 :four hundred forty eight plus five hundred twenty five
53-115: fifty-three minus one hundred fifteen
132-763 :one hundred thirty two minus seven hundred sixty three
880-2318 :eight hundred eight minus two thousand three hundred and eighteen
365-2302 :three hundred sixty five minus two thousand three hundred two
448-525 :four hundred forty eight minus five hundred twenty five
53+132: fifty-three plus:one hundred thirty two
2302 -448: two thousand three hundred two minus four hundred forty eight
365+525 :three hundred sixty five plus five hundred twenty five
các câu còn lại làm tương tự nhé
Bài 2: Tính nhanh
a) 29 + 132 + 237 + 868 + 3
= 29+(132+858)+(237+3)
=29+990+240
=1259
27 +132 + 237 + 868 + 763 = (237 + 763) + (132 + 868) + 27
= 1000 +1000 + 27 = 2027.
\(=\left(763+37\right)+\left(888+312\right)+237=800+1200+237=2237\)
37 + 312 + 237 + 888 + 763
= ( 237 + 763 ) + ( 312 + 888 ) + 37
= 1000 + 1200 + 37
= 2237
a, 29 + (132+868)+(237+763)
= 29+1000+1000=2029
b,(652+148)+(327+73) + 15=1215
c,(146+54)+(121+379) = 200+500=700
d,(-452-548)+(395+605)=-1000+1000=0
a)29+132+237+868+763
=161+1105+763
=1266+763
=2029
b)652+327+148+15+73
=979+163+73
=1142+73
=1215
c)146+121+54+379
=267+433
=700
d)(-452)+395+(-548)+605
=(-57)+57
=0
53.51+51.4+ 53.49+ 53.96+53
= 53.(51+49)+ 53.( 96+4)+ 53
= 53.100+ 53. 100 + 53
= 5300+5300+53
=10600+53
=10653
****
\(53\cdot\left(51+4\right)+53\cdot\left(49+96\right)+53\)
=\(53\cdot55+53\cdot145+53\cdot1\)
=\(53\cdot\left(55+145+1\right)\)
=\(53\cdot201\)
=10653
nếu Đ thì k cho mk nhá
$-53\cdot237+763\cdot(-53)$
$=-53\cdot(237+763)$
$=-53\cdot1000$
$=-53000$
-53.237 + 763.(-53)
= - 53.( 237 + 763)
= - 53. 1000
= -53000