a)12 x ( 367 + 82 ) = 82 x 12 + 12 x 367
b) ( 175 - 26 ) x 17 < 17 x 177 - 17 x 26
a)Vì 12 x ( 367 + 82 ) = 5 388;82 x 12 + 12 x 367 = 5 388
b)Vì ( 175 - 26 ) x 17 = 2 533;17 x 177 - 17 x 26 =2 567
Khong tinh ket qua hay dien dau >, <, = thich hop vao o trong co giai thich
a) 7/9+11/13+24/25 ... 3
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b)9/8+13/12+15/13+5/4 ... 4
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1.tinh gia tri cua bieu thuc
a)45 x 789 +15 x 263 + 60 x 789 - 10 x 789
b)234 x 17 + 34 x 117 + 198 x 78
giup mk nhe thanks
bai 3 : cho bieu thuc : a = 500 + x va b = x - 500 , voi x = 8075
a, tinh gia tri cua a va b
b , tinh gia tri cua a + b
giai theo cach lop 4 nhe , nhanh len
Bai3: Tính
b. 4 x 6 x 10 x 12 x 15/ 4 x 12 x 5 x 24 x 30 =
c. 34 x 101 x 2005/ 17 x 202 x 4010=
d.6 x 8 x 11 x 13 x 17/ 33 x 16 x 17 x 26 =
khong lam tinh hay cho biet chu so tan cung cua moi ket qua sau
a,(1991+1992 +.....+1999) - (11+12+...+19)
b, (1981+1982+...+1989)* (1991=1992+...+1999)
c, 21*23*25*27-11*13*15*17
d,6*16*116*1216*11996
e,31*41*51*61*71*81*91
g,1*3*5*7*...*99
dau * nay la dau nhan
KHONG TINH KET QUA HAY SO SANH A VA B BIET
A = 9090 x 17 B = 1717x 90
Bµi 1 1 37064 – 64 x 82 42966 217 2 320 – 120.5 95,25 5,25 874 12 x 12,53 132 x 9 132 4 48 x 17 48 x 3 5 56 x 27 56 x 35 62 6 45 x 48 – 90 x 24 145 7 754 x 75 – 2262 x 25 4568 8 1050 15 – 350 5 1769 4320 9 – 8640 18 750 10 316 192 384 321 108 11 24 25 26 ….. 124 125 126 12 154 – 153 152 – 151 150 – 149 ….. 4 – 3 2 – 113 37 x 38 – 19 x 74 1000 14 0.48 x 500 – 2.4 x 40 x 2
Tinh gia tri bieu thuc:
12 x 4 (a x 1 + a : 1)=...........
cho a + b = 13 hay tinh gia tri cua bieu thuc 102 x a + 98 x b + 52 x a + 57 x b + a
