tinh bang cach thuan tien nhat:1+8+29+32
Tinh bang cach thuan tien nhat
( 48 + 32 + 56 ) : 8
( 48 + 32 + 56 ) : 8
= 48 : 8 + 32 : 8 + 56 : 8
= 6 + 4 + 7 = 10 + 7 = 17
( 48 + 32 + 56 ) : 8
= (48 : 8) + (32 : 8) + (56 : 8)
= 6 + 4 + 7
= 10 + 7
= 17
tinh bang cach thuan tien nhat
16*48+8*48+32*14
16x48+8x48+32x14
=48x(16+8)+32x14
=48x24+32x14
=1152+448
=1600
16 x 48 + 8 x 48 + 32 x 14
= 48 x (16 + 14) x (32 + 8)
=48 x 20 x 40
=38400
tinh bang cach thuan tien nhat :
1 gio 15 phut + 75 phut + 1,25 gio x 8
\(1gio15phut+75phut+1,25gio\times8\)
\(=1gio15phut+1gio15phut+10gio\)
\(=2gio30phut+10gio\)
\(=12gio30phut\)
1 giờ 15 phút + 75 phút + 1,25 giờ `xx8`
= 1,25 giờ + 1,25 giờ + 1,25 giờ `xx8`
= 1,25 giờ `xx` (1+1+8)`
= 1,25 giờ `xx` 10
= 12,5 giờ
tinh bang cach thuan tien nhat
713*3+713*97
375*29-375-9
713*3+713*97
= 713 *(3+97)
= 713*100
= 71300
375*29-375-9
Sai đề rồi bạn thế này mới đúng
375*29-375*9
1+2+3+4+5+6+7+8+9
tinh bang cach thuan tien nhat
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9
= (1 + 9) + (2 + 8) + (3 + 7) + (4 + 6) +5
= 10 + 10 + 10 +10 + 5
= 10 x 4 + 5
= 40 + 5
= 45
1+2+3+4+5+6+7+8+9
=[1+9]+[2+8]+[3+7]+[4+6]+5
=10+10+10+10+5
=40+5
=45
47+58+83-29-17-53= tinh bang cach thuan tien nhat nhat va ai lam nhanh va d milk tk ok
47+58+83-29-17-53
= (47 - 17) + ( 83 - 53 ) + ( 58 - 29 )
= 30 + 30 + 29
= 60 + 29
= 89
co tien ko ban
cac ban giai giup minh bai nay voi , nhanh nha minh dang can gap
1/2+ 1/4 +1/8 + 1/16 + 1/32 + 1/64
tinh bang cach thuan tien nhat mha
\(=\frac{32+16+8+4+2+1}{64}=\frac{63}{64}\)
TINH BANG CACH THUAN TIEN NHAT
\(\dfrac{1}{3}+\dfrac{6}{5}-\dfrac{1}{5}+\dfrac{2}{3}=2\)
Tinh bang cach thuan tien nhat 4/15+8/13+11/5+5/13
\(\frac{4}{15}+\frac{8}{13}+\frac{11}{15}+\frac{5}{13}\)
\(=\left(\frac{4}{15}+\frac{11}{15}\right)+\left(\frac{8}{13}+\frac{5}{13}\right)\)
\(=\frac{15}{15}+\frac{13}{13}\)
\(=1+1\)
\(=2\)
Chúc bạn học tốt nha !!!
\(\frac{4}{15}+\frac{8}{13}+\frac{11}{15}+\frac{5}{13}\)
\(=\left(\frac{4}{15}+\frac{11}{15}\right)+\left(\frac{8}{13}+\frac{5}{13}\right)\)
\(=1+1\)
\(=2\)
=(4/15+11/5)+(8/13+5/13)
=37/15+1=52/15
k mink nha