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Warm-up #1 (3/28-4/1)

Monday:

Solve:
2.                                      3.

Hw: p. 681 #1,4,5,12,17,33-35

Tuesday:

1.                                     2.                             3.                   =

4. It takes Dustin 2 hours to shovel the snow from his driveway and side walk. It takes his sister 3 hours to shovel the
same area. How long will it take them to shovel the walk if they work together?

Dustin’s part      +      His sister            =     Work together

Hw: p. 681 #2,6,16,20 - 26

Wednesday

Multiply/subtract/ divide

1.                                     2.                                           3.
4.Julio can wash and wax the family car in 2 hours. It takes Leo 3 hours to wash and wax the same car. How
long will it take them to wash and wax the car if they work together?

Julio’s part         +   Leo’s part       =    Work together

Hw: p. 685 # 2,6,9,10,11,15,19,20,27

Thursday:

x 3 2                               2    9                                      2   n4
1.                               2.                                          3.       2
2 2 x                             x 1 2x  3                                  n2 n 4

Hw: p. 690 #3,7,11,12,14,17,19,23,26,29,31

Friday:

1. A chemistry student needs to make a solution that is 70% water and 30% hydrochloric acid. The student’s
current mixture of 300 ml is 60% water and 40% hydrochloric acid. How much water must the student add to
achieve his desired solution?
Water                   Total (mL)

Current                                 300

New                                     300 + a

3x      1                                              3m      1
2.                                                      3.        
2x  4 x  3                                            2m 2
2m

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tang shuming