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a,234.4+234.5+234=234(4+5+1)=234.10=2340
b,135.16-135.2-135.4=135(16-4-2)=135.10=1350
c,1/2+1/4+1/8+1/16+1/32+1/64=1-1/2+1/2-1/4+1/4-1/8+1/8-1/16+1/16-1/32=1-1/32=31/32
a) 234 x4 + 234 x 5 + 234 = 234 x ( 1+4+5)=2340
b)135 x16 -135 x2 -4 x135 =135 x (16-2-4) =1350
\(1678+x=998\times45\)
\(1678+x=44910\)
\(x=49910-1678\)
\(x=43232\)
\(178941:x=21\)
\(x=178941:21\)
\(x=8521\)
\(1152+678+x=99912\)
\(1830+x=99912\)
\(x=99912-1830\)
\(x=98082\)
\(x\times48=15348\)
\(x=153648:48\)
\(x=3201\)
a: =234x(45+54+1)
=234x100
=23400
b: =(8x125)x(50x20)
=1000x1000
=1000000
a = 243x(45+54+1)
=243 x 100
=24300
b = (20 x 50 ) x (8x125)
=1000x1000
=1000000
a: =1250:25=50
b: =234(45+55)+234=23400+234=23634
c: =1000x1000=1000000
4562 + 234 x 9
= 4562 + 2106
= 6668
45235 : 5 + 4587
= 9047 + 4587
= 13634
( 4587 - 587 ) x 45
= 4000 x 45
= 180 000
789 x 6 - 987
= 4734 - 987
= 3747
\(4562+234\times9\)
\(=4562+2106\)
\(=6668\)
__________________________
\(45235:5+4587\)
\(=9047+4587\)
\(=13634\)
__________________________
\(\left(4587-587\right)\times45\)
\(=4000\times45\)
\(=180000\)
__________________________
\(789\times6-987\)
\(=4734-987\)
\(=3747\)
(45678+1234):x=32
x=46912:32
x=1466
(45678+1234):x=32
x=46912:32
x=1466