45*48-90*24+145

= 45*48 - 45*2 * 24 + 145

= 45 * 48 - 45 * 48 + 145

= 0 + 145 = 145

45*48-90*24+145

=45*48-45*2*24+145

=45*48-45*48+145

=0+145

=145

45 x 48 - 90 x 24 + 145

= 45 x 48 - 45 x 2 x 24 + 145

= 45x 48 - 45 x 48 + 145

= 0 + 145 = 145

~ Hok tốt ~

45 x 48 - 90 x 24 + 145

= 45 x 48 - 45 x 2 x 24 + 145

= 45 x 48 - 45 - 48 + 145

= 45 x ( 48 - 48 ) + 145

= 45 x 0 + 145

= 0 + 145

= 145

~ Hok tốt ~

45 x 48 - 90 x 24 + 145

= 45 x 48 - 45 x 2 x 24 + 145

= 45 x 48 - 45 x 48 + 145

= 45 x ( 48 - 48 ) + 145

= 45 x 0 + 145

= 0 + 145 

= 145

123x456456+123123x456=56144088+56144088=112288176

45x48+90x24+145=2160+2160+145=4465

123 . 456456 + 123123 . 456

=123 . 456 . 1001 + 123 . 456 .1001

=123 . 456 . 1001 . 2

=56088 . 2002

=112288176

45 . 48 + 90 . 24 + 145

=45 . 2 . 24 + 90 . 24 + 145

=90 . (24+24) + 145

=90 . 48 + 145

=4320 + 145

=4465

chúc bạn học tốt nha

cảm ơn các bn nhưng mk cần câu trả lời theo cách tính nhanh. thankyou very much. love you

Bạn có chắc bài này của lớp 6 ?

45x48-90x24+145=145

4320:9-8640:18+750=750

754x75-2262x25+4568=4568

a, BCNN(540;360) = 1080

b, BCNN(45;60) = 180

c, BCNN(36;180) = 180

d, BCNN(16;48;150) = 1200

e, BCNN(60;90;135) = 540

f, BCNN(24;72;280) = 2520

a, BCNN(540;360) = 1080

b, BCNN(45;60) = 180

c, BCNN(36;180) = 180

d, BCNN(16;48;150) = 1200

e, BCNN(60;90;135) = 540

f, BCNN(24;72;280) = 2520

(45*46+47*48)*(51*52-49*48)*(45*128-90*64)*(1995*1996+1997*1998) = 0

(45·46+47·48)·(51·52−49·48)·(45·128−90·64)·(1995·1996+1997·1998)

=(45·46+47·48)·(51·52−49·48)·(45·2·64−90·64)·(1995·1996+1997·1998)

=(45·46+47·48)·(51·52−49·48)·(90·64−90·64)·(1995·1996+1997·1998)

=(45·46+47·48)·(51·52−49·48)·0·(1995·1996+1997·1998)

=0

\(\left(45\cdot46+47\cdot48\right)\cdot\left(51\cdot52-49\cdot48\right)\cdot\left(45\cdot128-90\cdot64\right)\cdot\left(1995\cdot1996+1997\cdot1998\right)\)

\(=\left(45\cdot46+47\cdot48\right)\cdot\left(51\cdot52-49\cdot48\right)\cdot\left(45\cdot2\cdot64-90\cdot64\right)\cdot\left(1995\cdot1996+1997\cdot1998\right)\)

\(=\left(45\cdot46+47\cdot48\right)\cdot\left(51\cdot52-49\cdot48\right)\cdot\left(90\cdot64-90\cdot64\right)\cdot\left(1995\cdot1996+1997\cdot1998\right)\)

\(=\left(45\cdot46+47\cdot48\right)\cdot\left(51\cdot52-49\cdot48\right)\cdot0\cdot\left(1995\cdot1996+1997\cdot1998\right)\)

\(=0\)

 (45 x 46 + 47 x 48) x (51 x 52 - 49 x 48) x (45 x 128 - 90 x 64) x (1995 x 1996 + 1997 x 1998)

=            A              x             B             x (45 x 128 - 45 x 2 x 64) x                C

= A x B x (45 x 128 - 45 x 128) x C

=A x B x 0 x C

=0

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