Bài 1.Thực hiện các phép tính sau:a)217 320 : 4;
b) 5025:5-25:5 ;
c) 218-180:2:9 ;
d)(328-8):32
Bài 2.Thực hiện phép tính.a) 27 . 75 + 25 . 27 –150
b)12 : { 400 : [500 –(125 + 25 . 7)]}
c) 13 . 17 –256 : 16 + 14 : 7 –1
d) 18 : 3 + 182 + 3.(51 : 17)
ko có bài 3 nhé!!
Bài 4.Thực hiện phép tínha) 375 : {32 –[ 4 + (5. 32–42)]} –14
b) {210 : [16 + 3.(6 + 3. 22)]} –3
Bài 1: Thực hiện các phép tính sau:
\(a)\)Chưa rỏ đề
\(b)\)\(5025\div5-25\div5\)
\(=\)\(1005-5\)
\(=\)\(1000\)
\(c)\)\(218-180\div2\div9\)
\(=\)\(218-10\)
\(=\)\(208\)
\(d)\)\(\left(328-8\right)\div32\)
\(=\)\(320\div32\)
\(=\)\(10\)
Bài 1:
a) ( Tôi không nhìn rõ đầu bài )
b) 5025 : 5 - 25 : 5
= ( 5025 - 25 ) : 5
= 5000 : 5
= 1000
c) 218 - 180 : 2 : 9
= 218 - 180 : ( 2 . 9 )
= 218 - 180 : 18
= 218 - 10
= 208
d) ( 328 - 8 ) : 32
= 320 : 32
= 10
Bài 2: Thực hiện phép tính:
\(a)\)\(27.75+25.27-150\)
\(=\)\(27.\left(75+25\right)-150\)
\(=\)\(27.100-150\)
\(=\)\(2700-150\)
\(=\)\(2550\)
\(b)\)\(12\div\left\{400\div\left[500-\left(125+25.7\right)\right]\right\}\)
\(=\)\(12\div\left\{400\div\left[500-\left(125+175\right)\right]\right\}\)
\(=\)\(12\div\left\{400\div\left[500-300\right]\right\}\)
\(=\)\(12\div\left\{400\div200\right\}\)
\(=\)\(12\div2\)
\(=\)\(6\)
\(c)\)\(13.17-256\div16+14\div7-1\)
\(=\)\(221-16+2-1\)
\(=\)\(206\)
\(d)\)\(18\div3+182+3.\left(51\div17\right)\)
\(=\)\(6+182+3.3\)
\(=\)\(6+182+9\)
\(=\)\(197\)
Bài 4: Thực hiện phép tính:
\(a)\)\(375\div\left\{32-\left[4+\left(5.3^2-42\right)\right]\right\}-14\)
\(=\)\(375\div\left\{32-\left[4+\left(5.9-42\right)\right]\right\}-14\)
\(=\)\(375\div\left\{32-\left[4+\left(45-42\right)\right]\right\}-14\)
\(=\)\(375\div\left\{32-\left[4+3\right]\right\}-14\)
\(=\)\(375\div\left\{32-7\right\}-14\)
\(=\)\(375\div25-14\)
\(=\)\(15-14\)
\(=\)\(1\)
\(b)\)\(\left\{210\div\left[16+3.\left(6+3.2^2\right)\right]\right\}-3\)
\(=\)\(\left\{210\div\left[16+3.\left(6+3.4\right)\right]\right\}-3\)
\(=\)\(\left\{210\div\left[16+3.\left(6+12\right)\right]\right\}-3\)
\(=\)\(\left\{210\div\left[16+3.18\right]\right\}-3\)
\(=\)\(\left\{210\div\left[16+54\right]\right\}-3\)
\(=\)\(\left\{210\div70\right\}-3\)
\(=\)\(3-3\)
\(=\)\(0\)
Bài 1: Thực hiện các phép tính sau:
a)a)Chưa rỏ đề
b)b)5025÷5−25÷55025÷5−25÷5
==1005−51005−5
==10001000
c)c)218−180÷2÷9218−180÷2÷9
==218−10218−10
