發表日期 2/28/2022, 10:22:14 PM
第一講四則運算
愛好篇
1 .運算: ( 1 )15+21+25+19 :
( 2 ) 70+63+81+37+30+19;
2 .運算: ( 1 )17+19+234+21+183+26�r
( 2 ) ( 1+11+21+31 ) + ( 9+19+29+39 )
3 .運算: ( 1 )35+121-35-21�r
( 2 ) 152-19-13+19+223-32 .
4 .運算: ( 1 ) 25- (25-14 } ( 14-7 ) ;
( 2 ) 57- ( 50-28 ) + ( 44-28 ) - ( 57-26 )
5 .運算: ( 1 )199+99+9 :
( 2 ) 9+98+397+247 .
6 .運算: ( 1 ) 321-499�r
( 2 ) 456-197-98 .
7 .請大傢先不要動筆,看能不能把下麵的題目直接口算齣來:
( 1 ) 2580-2547�r
( 2 ) 1596-1296;
( 3 ) 365+97 :
( 4 ) 365-97 .
8 .運算: ( 1 )150-85-15�r
9 .運算: ( 1 )38+83-55�r
( 2 ) ( 235+523+352 } ( 111+333+555 ) .
10 .運算: ( 1 )11-10+9-8+7-6+5-4+3-2+1�r
( 2 ) 100+102-104+106-108+110-112+114-116+118 .
拓展篇
1 .運算: ( 1 }51+62+49+38 :
( 2 ) 64+127+129+23+71+136 ・
2 .運算: ( 1 )2+13+224+3330+6670+676+87+8�r
( 2 ) 73+119+231+69+381+17 .
3 .運算: ( 1 )82-29-22+259�r
( 2 ) 375-138+247-175+139-237 .
4 .運算: ( 1 ) 162- (162-135 ) ( 35-19 )�r
( 2 ) 163- ( 50-18 ( 153-76 ) + ( 124-18 )�q
5 .運算: ( 1 )999+599+199�r
( 2 ) 3996+449+98+9 .
6 .運算: ( 1 )1365-598�r
7 .請大傢先不要動筆,看能不能把下麵的題目直接口算齣來:
( 1 ) 93570-93534 :
( 2 ) 45235-38235 ;
( 3465+197 ;
( 4 ) 465-197 .
8 .運算: ( 1 )280-24-76-65-35 :
( 2 ) 267-162+84-38-147+116 .
9 .運算: ( 1 )267-136+36-167�U
( 2 ) 325-251-34+151-66 .
10 . ( 1 )在加法算式中,假如一個加數增加10 ,另一個加數削減5 ,兩數的和如何變化
( 2 )在減法算式中,假如被減數增加15 ,差削減8 ,那麼減數應如何變化
11 .運算: ( 1 )246+462+624-888 :
( 2 ) 125-24+251-240+512-402 .
12 .運算: ( 1 )21-20+19-18+17-16+15-14+13-12+11�r
( 2 ) 12+23-34+45-56+67-78+89-78+67-56+45-34+23+12�q