(-3,2)x -15/64+(0,8-2 và 4/5):3 và 2/3
Giup mình nha,mình cần gấp !!!!!!!!
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BÀI 1 TÍNH GIÁ TRỊ BIỂU THỨC
H = ( - 3,2 ) NHÂN -15 PHẦN 64 + ( 0,8 _ HỖN SỐ 2 4 PHẦN 15 ) NHÂN HỖN SỐ 3 2 PHẦN 3
CÁC BẠN ƠI GIÚP MÌNH NHÉ AI NHANH MK TICK CHO MÌNH ĐANG GẤP LẮM
a) (15-121/18):297/27-17/8:51/40=?
b) (-3,2)×(-15/64 )+(0,8-34/15):11/3=?
c) 6/7+5/8:5-3/16×(-2) mũ 2=?
d) (-5/24+0,75+7/12):(-7/8)=?
Giúp mình với nha!!
a; (15 - \(\dfrac{121}{18}\)) : \(\dfrac{297}{27}\) - \(\dfrac{17}{8}\) : \(\dfrac{51}{40}\)
(\(\dfrac{270}{18}\) - \(\dfrac{121}{18}\)) : \(\dfrac{297}{27}\) - \(\dfrac{17}{8}\) x \(\dfrac{40}{51}\)
= \(\dfrac{149}{18}\) : \(\dfrac{297}{27}\) - \(\dfrac{5}{3}\)
= \(\dfrac{149}{18}\) x \(\dfrac{27}{297}\) - \(\dfrac{5}{3}\)
= \(\dfrac{149}{198}\) - \(\dfrac{5}{3}\)
= \(\dfrac{149}{198}\) - \(\dfrac{330}{198}\)
= \(\dfrac{-181}{198}\)
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b; (- 3,2) x (- \(\dfrac{15}{64}\)) + (0,8 - \(\dfrac{34}{15}\)): \(\dfrac{11}{3}\)
= (\(\dfrac{-16}{5}\)) x ( \(\dfrac{-15}{64}\)) + (\(\dfrac{4}{5}\) - \(\dfrac{34}{15}\)): \(\dfrac{11}{3}\)
= \(\dfrac{3}{4}\) + (\(\dfrac{4}{5}\) - \(\dfrac{34}{15}\)): \(\dfrac{11}{3}\)
= \(\dfrac{3}{4}\) + (\(\dfrac{12}{15}\) - \(\dfrac{34}{15}\)) : \(\dfrac{11}{3}\)
= \(\dfrac{3}{4}\) + \(\dfrac{-22}{15}\) : \(\dfrac{11}{3}\)
= \(\dfrac{3}{4}\) - \(\dfrac{22}{15}\) x \(\dfrac{3}{11}\)
= \(\dfrac{3}{4}\) - \(\dfrac{2}{5}\)
= \(\dfrac{15}{20}\) - \(\dfrac{8}{20}\)
= \(\dfrac{7}{20}\)
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c; \(\dfrac{6}{7}\) + \(\dfrac{5}{8}\): 5 - \(\dfrac{3}{16}\) x (- 2)2
= \(\dfrac{6}{7}\) + \(\dfrac{5}{8}\) x \(\dfrac{1}{5}\) - \(\dfrac{3}{16}\) x 4
= \(\dfrac{6}{7}\) + \(\dfrac{1}{8}\) - \(\dfrac{3}{4}\)
= \(\dfrac{48}{56}\) + \(\dfrac{7}{56}\) - \(\dfrac{42}{56}\)
= \(\dfrac{55}{56}\) - \(\dfrac{42}{56}\)
= \(\dfrac{13}{56}\)
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Xem thêm câu trả lời
(-3,2)x-15/64+(0,8-2/4/15:3/2/3=
(-3,2) . -15/64 + ( 0,8 - 2 4/5 ) : 3 2/3
(-3,2)x-15/64+(0,8-2 4/15):3 2/3
(-3,2).-15/64+(0,8-2/4/15):3/2/3
(-3,2) . -15/64 + 0,8-2/4/15 : 3/2/3
đó bạn
\(-3,2\cdot\left(-\dfrac{15}{64}\right)+0,8-\dfrac{2}{\dfrac{4}{15}}:\dfrac{3}{\dfrac{2}{3}}\)
\(=\dfrac{3}{4}+\dfrac{4}{5}-\dfrac{15}{2}:\dfrac{9}{2}\)
\(=\dfrac{31}{20}-\dfrac{5}{3}\)
\(=-\dfrac{7}{60}\)
Đề bài như này đúng không nhỉ bạn?
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(-3,2) . \(\dfrac{15}{64}\) - (0,8 - \(2\dfrac{4}{15}\)) : \(3\dfrac{2}{3}\)
\(\left(-3,2\right).\dfrac{15}{64}-\left(0,8-2\dfrac{4}{15}\right):3\dfrac{2}{3}\\ =-\dfrac{16}{5}.\dfrac{15}{64}-\left(\dfrac{4}{5}-\dfrac{34}{15}\right):\dfrac{11}{3}\\ =-\dfrac{3}{4}-\left(-\dfrac{22}{15}\right).\dfrac{3}{11}\\ =-\dfrac{3}{4}-\left(-\dfrac{2}{5}\right)=-\dfrac{3}{4}+\dfrac{2}{5}=-\dfrac{7}{20}\)
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(-3,2) . \(\dfrac{-15}{64}\) + (0,8 - 2\(\dfrac{4}{15}\) ) : 3\(\dfrac{2}{3}\)
\(\left(-3,2\right).\dfrac{-15}{64}+\left(0,8-2\dfrac{4}{15}\right):3\dfrac{2}{3}\)
\(=\left(\dfrac{-16}{5}\right).\dfrac{-15}{64}+\left(\dfrac{4}{5}-\dfrac{34}{15}\right):\dfrac{11}{3}\)
\(=\left(\dfrac{-16}{5}\right).\dfrac{-15}{64}+\left(\dfrac{-22}{15}\right).\dfrac{3}{11}\)
\(=\dfrac{3}{4}+\left(\dfrac{-2}{5}\right)\)
\(=\dfrac{7}{20}\)
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