蘇教版六年級(jí)數(shù)學(xué)下解決問(wèn)題的策略2

1、解決問(wèn)題的策略,有14支筆獎(jiǎng)給6名出色的學(xué)生，每人至少2支，最多3支，那么得2支的有幾人？得3支的有幾人？,全班42人去公園劃船，一共租用了10只船。每只大船坐5人，每只小船坐3人。租用大船和小船各有幾只？,10,7,5,9,8,6,4,3,2,1,0,假設(shè)10只都是大船,,,,,,,,,,,,,10,,0,5×10=50 人,多了8人,8÷ 2=4,大船改小船,6×5+4×3=42,正好,4,6

2、,9,6,4,8,7,5,3,2,1,0,T,假設(shè)9條大船、一條小船,,9,1,6,4,6×5+4×3=42,正好,大船改小船,6÷ 2=3,,,,,,,,,9×5+1×3=48,多了6人,10,6,4,8,7,5,3,2,1,0,T,假設(shè)8條大船、2條小船,8,2,6,4,6×5+4×3=42,正好,大船改小船,4÷ 2=2,,,,,,,8×5+

3、2×3=46,多了4人,10,6,4,9,7,5,3,2,1,0,T,假設(shè)7條大船、3條小船,7,3,6,4,6×5+4×3=42,正好,大船改小船,2÷ 2=1,,,,7×5+3×3=44,多了2人,10,6,4,9,8,5,3,2,1,0,T,假設(shè)6條大船、4條小船,6,4,6×5+4×3=42,正好,10,7,4,9,8,5,3,2,1,0,T,假設(shè)小

4、船和大船各一半,,,5,5,6,4,6×5+4×3=42,正好,小船改大船,2÷ 2=1,少了2人,5×5+5×3=40,10,7,4,9,8,6,3,2,1,0,T,假設(shè)4條大船、6條小船,,,4,6,6,4,6×5+4×3=42,正好,小船改大船,4÷ 2=2,,,少了4人,4×5+6×3=38,10,7,5,9,8,6,3,2,1,

5、0,T,假設(shè)3條大船、7條小船,,,3,7,6,4,6×5+4×3=42,正好,小船改大船,6÷ 2=3,,,,,少了6人,3×5+7×3=36,10,7,5,9,8,6,4,2,1,0,T,假設(shè)2條大船、8條小船,,,2,8,6,4,6×5+4×3=42,正好,小船改大船,8÷ 2=4,,,,,,,少了8人,2×5+8×3=34,10,

6、7,5,9,8,6,4,3,1,0,T,假設(shè)1條大船、9條小船,,,1,9,6,4,6×5+4×3=42,正好,小船改大船,10÷ 2=5,,,,,,,,少了10人,1×5+9×3=32,10,7,5,9,8,6,4,3,2,0,T,假設(shè)10只都是小船,,,,,,,,,,,,,10,0,3×10=30 人,少了12人,小船改大船,12÷ 2=6,正好,6×5

7、+4×3=42,4,6,10,7,5,9,8,6,4,3,2,1,T,雞和兔一共有８只，數(shù)一數(shù)腿有22條。你知道雞和兔各有多少只嗎？,如果假設(shè)都是雞,如果假設(shè)都是兔,,,,如果假設(shè)都是雞,,T,下,8,少了6條,8×2=16條,0,雞換兔,6÷ 2=3,3,5,5×2+3×4=22條,正好,,如果假設(shè)都是兔,j,下,0,正好,10÷ 2=5,5,8,8×4=32條,多