(1) It is assumed that they are all 10 yuan.

43× 10=430 (yuan)

430-340=90 (yuan)

10-5=5 (yuan)

5 yuan dollar: 90÷5= 18 (Zhang)

10 RMB: 43- 18=25 (Zhang)

(2) Suppose he hits all 2-pointers.

2×9= 18 (points)

20- 18=2 (points)

3-2= 1 (points)

3 o'clock: 2÷ 1=2 (pieces)

2 points: 9-2=7 (pieces)

(3) Assume that all the TVs produced in these four days are qualified.

500×4=2000 (unit)

2000×5= 10000 (minutes)

10000-993 1=69 (point)

Unqualified: 69÷23=3 (unit)

Qualified: March 2000 =1997 (Taiwan Province)

(4) Suppose the box is full of small steel balls.

7×30=2 10 (g)

266-2 10=56 (g)

1 1-7=4 (g)

Large steel balls: 56÷4= 14 (pieces)

Small steel balls: 30- 14= 16 (pieces)

(5) Assume that the unit price of football and basketball is the same.

3×8=24 (yuan)

3 12-24=288 (yuan)

3+5=8 (yuan)

Basketball: 288÷8=36 (yuan)

Football: 36+8=44 (Yuan)

(6)120 ÷12 =10 (days)

Suppose 10 is sunny.

20× 10=200 (piece)

200- 120=80 (piece)

20- 10= 10 (piece)

Rainy day: 80÷ 10=8 (days)

Sunny day: 10-8=2 (days)

(7) Assume that everything is in good condition.

2000× 1.2=2400 (yuan)

2400-2005=395 (yuan)

1.2+6.7=7.9 (yuan)

Damage: 395÷7.9=50 (block)

In good condition: 2000-50= 1950 (block)

(8) Assume that all rabbits.

80×4=320 (only)

320+52=372 (only)

4+2=6 (only)

Chicken: 372÷6=62 (only)

Rabbit: 80-62= 18 (only)

P65

(4)15.6 ÷ 78% × 21%= 4.2 (length)

(5) Assume that all ships.

3× 16=48 (person)

60-48= 12 (person)

4-3= 1 (person)

Big ship: 12÷ 1= 12 (only)

Small boat: 16- 12=4 (only)

(6)4×3+2= 14 (only)

Chicken: 280÷ 14=20 (only)

Rabbit: 203=60 (only)

(7) Suppose Xiao Ming answers all the answers correctly.

20×5= 100 (minutes)

100-79=23 (point)

5+2=7 (point)

Wrong answer: 2 1÷7=3 (question)

Correct answer; 20-3= 17 (theme)

(8)5+2+0.5=7.5 (Yuan)

Suppose it's all dimes.

30×0. 1=3 (yuan)

7.5-3=4.5 (Yuan)

1-0. 1=0.9 (yuan)

1 yuan: 4.5÷0.9=5 (pieces)

1 cent: 30-5=25 (pieces)

(9) Assume that 90 people are all girls.

90×80=7200 (minimum)

73×90=6570 (minimum)

7200-6570=630 (minutes)

80-70= 10 (point)

Male: 630÷ 10=63 (person)

Female: 90-63=27 (person)

63-27=36 (person)

(10) It is assumed that everything is normal.

250×20=5000 (yuan)

5000-4400=600 (yuan)

100+20= 120 (yuan)

Damage: 600÷ 120=5 (pieces)

In good condition: 250-5=245 (pieces)

( 1 1)A: 1÷ 12 = 1。

b: 1÷ 18 = 18 1。

18 1× 16 = 9, choose 8.

1-8/9 = 65438/9+0

12 1- 18 1=36 1

A: 1÷36+0 = 4 (days).

Wish: learning progress!