Time, Liquid Volume, and Mass: math test solutions, Grade 3 – download the PDF

1 Reading clocks / 4 pts

(a) First clock: 8:27 (1 pt). Second clock: 1:53 (1 pt).

(b) \(60 - 27 = 33\) minutes until 9:00 (1 pt). \(60 - 53 = 7\) minutes until 2:00 (1 pt).

2 Elapsed time / 4 pts

(a) 9:35 to 10:00 is 25 minutes, and 10:00 to 10:20 is 20 minutes. \(25 + 20 = 45\) minutes. (1 pt for the jumps, 1 pt for the answer)

(b) 2:48 to 3:00 is 12 minutes, and 3:00 to 3:30 is 30 minutes. \(12 + 30 = 42\) minutes. (1 pt for the jumps, 1 pt for the answer)

3 End time / 3 pts

From 6:25 jump 35 minutes to 7:00 (1 pt). \(50 - 35 = 15\) minutes remain (1 pt). The play ends at 7:15 p.m. (1 pt).

4 Converting units / 3 pts

(a) \(6 \times 1{,}000 = 6{,}000\) mL (1 pt).

(b) \(8{,}000 \div 1{,}000 = 8\) kg (1 pt).

(c) \(2{,}000 + 500 = 2{,}500\) mL (1 pt).

5 The water cooler / 3 pts

(a) \(18 \times 250 = 4{,}500\) mL, which is 4 L 500 mL (1 pt).

(b) The cooler held \(10 \times 1{,}000 = 10{,}000\) mL, and \(10{,}000 - 4{,}500 = 5{,}500\) mL (1 pt). 5,500 mL, or 5 L 500 mL, is left (1 pt).

6 Packing a suitcase / 3 pts

Convert to grams: 7 kg is 7,000 g and 3 kg 200 g is 3,200 g (1 pt). Add: \(7{,}000 + 1{,}800 + 3{,}200 = 12{,}000\) g (1 pt). The total mass is 12,000 g, which is 12 kg (1 pt).