7
填一填
10个
是()元;4个
是()元;
4张
是()元;6张
是()元;
()张
是100元;()张
是100元。
填一填
10个
4张
()张
答案
1;2;20;60;5;2
解析
10个1角是10角,10角=1元;4个5角是20角,20角=2元;4张5元是4×5=20元;6张10元是6×10=60元;100元里有100÷20=5张20元;100元里有100÷50=2张50元。
连一连
$5 + 13 =$ $20 + 26 =$ $60 - 30 =$
$36 - 15 =$ $22 + 19 =$ $77 - 8 =$
$83 + 7 =$ $26 + 25 =$ $5 + 55 =$
$71 - 42 =$ $53 - 14 =$ $36 - 3 =$
$34 + 11 =$ $81 - 3 =$ $6 + 25 =$
$30 + 40 =$ $74 - 24 =$ $54 + 5 =$
$20 - 5 + 6 =$ $12 + 7 - 11 =$ $66 + 20 - 68 =$
$42 - 2 + 14 =$ $34 + 12 - 21 =$ $88 - 34 + 3 =$
$5 + 13 =$ $20 + 26 =$ $60 - 30 =$
$36 - 15 =$ $22 + 19 =$ $77 - 8 =$
$83 + 7 =$ $26 + 25 =$ $5 + 55 =$
$71 - 42 =$ $53 - 14 =$ $36 - 3 =$
$34 + 11 =$ $81 - 3 =$ $6 + 25 =$
$30 + 40 =$ $74 - 24 =$ $54 + 5 =$
$20 - 5 + 6 =$ $12 + 7 - 11 =$ $66 + 20 - 68 =$
$42 - 2 + 14 =$ $34 + 12 - 21 =$ $88 - 34 + 3 =$
答案
本题无选项,若为连线题,按上述解析连线即可。
解析
本题可先分别计算出各个算式的结果,再将结果相同的算式连起来。
$5 + 13 = 18$;
$20 + 26 = 46$;
$60 - 30 = 30$;
$36 - 15 = 21$;
$22 + 19 = 41$;
$77 - 8 = 69$;
$83 + 7 = 90$;
$26 + 25 = 51$;
$5 + 55 = 60$;
$71 - 42 = 29$;
$53 - 14 = 39$;
$36 - 3 = 33$;
$34 + 11 = 45$;
$81 - 3 = 78$;
$6 + 25 = 31$;
$30 + 40 = 70$;
$74 - 24 = 50$;
$54 + 5 = 59$;
$20 - 5 + 6 = 15 + 6 = 21$;
$12 + 7 - 11 = 19 - 11 = 8$;
$66 + 20 - 68 = 86 - 68 = 18$;
$42 - 2 + 14 = 40 + 14 = 54$;
$34 + 12 - 21 = 46 - 21 = 25$;
$88 - 34 + 3 = 54 + 3 = 57$。
结果相同的算式连线如下:
$5 + 13$与$66 + 20 - 68$相连;$36 - 15$与$20 - 5 + 6$相连;其余算式按结果相同依次相连(因不知具体连线形式要求,以结果相同为一组)。
$5 + 13 = 18$;
$20 + 26 = 46$;
$60 - 30 = 30$;
$36 - 15 = 21$;
$22 + 19 = 41$;
$77 - 8 = 69$;
$83 + 7 = 90$;
$26 + 25 = 51$;
$5 + 55 = 60$;
$71 - 42 = 29$;
$53 - 14 = 39$;
$36 - 3 = 33$;
$34 + 11 = 45$;
$81 - 3 = 78$;
$6 + 25 = 31$;
$30 + 40 = 70$;
$74 - 24 = 50$;
$54 + 5 = 59$;
$20 - 5 + 6 = 15 + 6 = 21$;
$12 + 7 - 11 = 19 - 11 = 8$;
$66 + 20 - 68 = 86 - 68 = 18$;
$42 - 2 + 14 = 40 + 14 = 54$;
$34 + 12 - 21 = 46 - 21 = 25$;
$88 - 34 + 3 = 54 + 3 = 57$。
结果相同的算式连线如下:
$5 + 13$与$66 + 20 - 68$相连;$36 - 15$与$20 - 5 + 6$相连;其余算式按结果相同依次相连(因不知具体连线形式要求,以结果相同为一组)。
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