新概念英語一第58~70課的A、B練習題答案
Lesson58 P-116A1. She usually drinks tea in the morning,but this morning,she is drinking coffee.2. They usually play in the garden in the afternoon,but this afternoon,they are playi…
計算:99又18分之17*(-6)
99又18分之17×(-6)
=(100 - 18分之1)×(- 6)
= - 600 + 3分之1
= - 599又3分之2
簡便計算18*(-2/3)+13*2/3-4*2/3快
18*(-2/3)+13*2/3-4*2/3
=-12+2/3×(13-4)
=-12+2/3×9
=-12+6
=-6
4.87+18/13+5.3等於多少(簡便計算)
4.87+18/13+5.3
=4.7+0.17+5/13+1+5.3
=11+17/100+5/13
=11+17*13/100+500/1300
=11+721/1300
76×168=?簡便運算
76×168
=(75+1)×168
=75×168+1×168
=(25×3)×(4×42)+168
=(25×4)×(42×3)+168
=100×126+168
=12600+168
=12768
99×168怎麼簡便計算
 ;
168-(68-49)怎樣簡便運算?
168-(68-49)
=(168-68)+49
=100+49
=149
860-168+159用簡便運算怎麼算
860-168+159
=(860-160)+(159-8)
=700+151
=851
55×168+31×55簡便計算
55×168+31×55
=55×(168+31)
=55×199
=55×(200-1)
=55×200-55×1
=11000-55
=10945
簡算:222222222/18
efs
222222222/18
=2×9×12345679/(2×9)
=12345679