More on Mass & feedback on homework

Learning objectives: 

• read the scale on a weighing machine where the indicator does not point exactly to the numbers on the scale
• Use a weighing machine to determine the order of the masses of two or three items
• use the unit, gram (g), for measuring mass
• read a scale which shows masses less than 500g
• measure and compare masses in g
• solve two-step word problems involving addition and subtraction
• solve one-step word problems involving multiplication/ division concept
• Using models to solve word problems

Feedback on pupils' homework

1. Inversion of numbers

There are many children who inverted the numbers in the tens and ones place (see picture). To prevent this, encourage them to read aloud their answers. For example:

one hundred, one hundred and ten, one hundred and twenty, one hundred and thirty... 

103 is read as one hundred and three.

130 is read as one hundred and thirty.

Otherwise, they can do the vertical working to prevent error: 

100 + 10 = 110

110 + 10 = 120

120 + 10 = 130 

2. Good Practice

Some scales in the workbook may seem too much for the children. Encourage them to extend a line from the indicator and between the intervals (the shorter lines).

Hope this helps!