<p>Find the sum of `-7` and `4` using the model below.</p><SignTiles data-props='{ "items": [ { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false } ]}'></SignTiles > + <SignTiles data-props='{ "items": [ { "signs": [ { "value": "+", "color": "green", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "+", "color": "green", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "+", "color": "green", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "+", "color": "green", "highlight": false, "disabled": false } ], "highlight_pair": false } ]}'></SignTiles >